Roasting-furnace.



A. RANKIN. EOASTING FURNACE. AIPLIOAI'IOII FILED DBO. 16, 1905.

mama "Se t 2.9, 1908.

I 2 SHEETS-SHEET 1.

WITNESSES.- I

w T .N. V m m w. A. RANKIN.

ROASTING FURNACE. APPLIOATION IILED 9120.16 1905.

Patented Sept. 29, 1908.

2 SHEEN-SHEET 2.

II. It

INVENTOR I anion.

WILLIAM-A. RANKIN, or MILWAUKEE, wIsCONsIN, ASSIGNOR ro AIJLIs-CrIALMERs COMPANY, OF MILWAUKEE, WISCONSIN, A CORPORATION OF NEW messy.

ROASTING-FURNAO'E.

. Specification of Letters Patent.

Patented Sept. 29, 1908.

To all whom it may concern:

Be it known that I, VVILLIAM A. RANKIN, a citizen of the United States, residin at Milwaukee, in the county of Milwau cc and State of Wisconsin, have invented certain new and useful Improvements in Roastin Furnaces, of which the following is a speci 1- cation.

This invention relates to a fiuidcirculatory system. f p

This invention has utility in structures wherein it is desired to control the temperature of parts with a minimum volume of circulating medium.

More particularly, this device is especially desirable when applied to ore roasting furnaces of the superposed hearth type wherein the control is of theadmission of water to the rabble arms of the different hearths.

A more satisfactory control of the temperature of said rabble arms on the different hearths is permitted and this with a much less quantity of water.

An embodiment of the invention is shown in the drawings wherein,

Figure 1 is a vertical sectionon the line plan bf the control arrangement shown in 1 Fig. {9. Fig. 5 is a Vertical section of a delivery nozzle used in the control shown in Fig. 3. Fig. 6 is a vertical section of the nozzle at right an les to the showing in Fig. 5.

The rotatab e member or shaft 1 has connected thereto the radiating arms 2 in a plurality of series. Eachseries of arms operates in a separate hearth. The arms carry the rabbles or plows 3 to stir the material on the hearth. The stem or member 1 is hollow and has a multiple pipe system therein. The

pipes, as shown in the drawing, may be operated as inlet pipes andeach pipein the member 1. serves as a conduit to conduct fluid to the arms in a hearth and at that point has radiating extensions 6 which extend outward nearly to the ends of the hollow'rabble arms. This pipe arrangement or passage system may extend to each hearth, or certain hearths may be omitted, as is found convenient or desirable in operation. Each inlet pipe has its control valve, as shown in Fig. 2, the valves 7, 8' and 9. These valves control the amount of Water which is admitted to the separate hearths from the main pipe 10, which may be an open receptacle of any suitable construction into which water may be discharged, or it may be a part of. a pi e or conduit system, the part shown by' the rawings, however, beingfree to rotate with re spect to a stationary part of said pipe, any fluid tight joint being provided, if necessary, to prevent leakage of water while permitting rotation to take place, the water passing through the pi es down to the hearth thence out to the enci of the arms. As the water emerges from these passages ,in' the ends of the arms, it will, in a roasting furnace, serve to cool the arms. The warm water will re turn to the central stem or shaft outside of the pipes, rise to the upper end Ofthe shaft or member, and be discharged at opening 11. In order that the attendant may observe the quantity of water delivered to each hearth, instead of the main pipe 10 having fittings directly 'to the valves, the pipes from the stem or member see Figs. 3 and 4are led to a box 12 having chambers therein. In the instance shown there is a separate chamber for each pipe. Nozzles 13 direct fluid into the separate chambers. The corre-' .s ondin r valves 4 5 and 6 control amount of liquid delivered to the pipes 4, 5 and 6. The valves tap the water delivery main 14. The nozzles 13 have their lower ends suitably formed to properly deliver the water into the separate chambers.

W hat is claimed and it is desired to secure by Letters Patent is:

1. The combination with a vertically disposed shaft of hollow rabble arms extended therefrom and closed at their extremities remote from theshaft, each of said rabble arms being provided with a conduitadapted to convey a liquid to the extremity of saidarm and discharge it into said arm, means for controllingthe flow of liquid to some of said arms independently of the flow of liquid to others of said arms, a common outlet from said arms being provided adapted to dissaid arms.

2; The combination with a vertically dis'- posed hollow shaft, of hollow rabble arms radiating therefrom and in open communication with the interior thereof, said rabble l i liquid from each of said arms and being proa series lying substantially in the same horiarms being arranged in series, each arm of zontal lane i es adaoted to conve Y a fluid to the extremities of and discharge said fluid into said hollow arms, means to control separately the [low of fluid to the arms of each of said series, said shaft providing a common 3 outlet for the fluid from each of said arms and being provided with an overflow disposed vertically above the uppermost series of i arms tion with the interior thereof, said rabble arms being arranged in series, each arm of a series lying substantially in the same horizontal plane, pipes adapted to convey a fluid to the extremities of and discharge said lluid into said hollow arms, a receptacle concen- -trically disposed with respect to said shaft and divided into a number of concentrically arranged compartments, a pipe which discharges into one of the series of arms being connected with one or said concentric conipartments, means adapted to convey a liquid 1 into each of said concentric compartments and means to control the supply of liquid to each of said concentric compartments, said shalt providing a common outlet ljoi the vided with an overllow disposed vertically above the uppermost series of arms.

4. The combination in a furnace, of super posed hearths, a vertical shal't extending through the hearths and provided with a'scries of arms in each hearth, separate inlct pipes for each series providing for circulation of a fluid to the arms, and means for separately controlling the. [low of lluid lo cuch separate inlet pipe.

5. The combination in a l'urnacc, of a shaft having stirring arms, separate pipcsat the upper end of the shalt for supplying a fluid to the arms, and manually operated stationary means for controlling the llow of lluid to the separate pipes. H

In testimony whereof I allix my signature in presence of two witnesses.

WllililAM A. HANlilX. \Yitnesses:

JoiiN Dar, J12, Geo. E. 'Kiaic. 

